function allwords() 
local line=io.read() 
local pos=1
return function () while line
do
local s,e=string.find(line,'%w+',pos) 
if(s) then
pos=(e+1)
return string.sub(line,s,e)  else 
line=io.read() 
pos=1

end

end
return nil  end  
end
for word in allwords() do
print(word) 
end
